1. In a large bowl, combine the tomatoes, green pepper, yellow pepper, red onion, 2 tablespoons oil, lime juice, vinegar, garlic, basil, and thyme. Season with salt and pepper to taste. The salsa can be made up to 3 hours ahead. 2. Build a hot charcoal fire or preheat a gas grill. Brush the fish with the remaining 2 teaspoons of oil and season with salt and pepper. Grill, turning once, until nicely charred and the fish is just cooked through, about 5 minutes per side. 3. Spoon the salsa over the fish and serve.

Note: Swordfish steads are often quite large, so simply cut the large piece of fish into serving-sized pieces.